Fluvac Innovator EHV-4/1 is an intramuscular vaccination for healthy horses 10 months of age or older as an aid in the prevention of equine rhinopneumonitis due to types 1 and 4 viruses, and equine influenza due to type A2 viruses. Provides protection against EHV-1 and EHV-4 A2 Influenza protection Single-dose convenience All vaccines are shipped Express 1-2 Days. A $29.95 flat rate fee is charged for all orders containing vaccines. Someone should be present to sign for and receive the vaccine order when it ships to you. For more shipping info click here. NOTE: This item cannot be shipped to Minnesota, Canada and P.O. Boxes. Use must be approved by your veterinarian.